Bypass Capacitors--An Interview With Todd Hubing:Positions I have taken in the past regarding bypass caps have generated some considerable controversy. In addition, Todd Hubing, et al, wrote an article (Footnote 1) on plane capacitance that has, unfortunately, been widely misinterpreted. Todd is an Assistant Professor in Electrical Engineering at the University of Missouri-Rolla. He was the keynote speaker at PCB Design Conference East last fall. After the conference, he and I entered into an e-mail exchange regarding his research and opinions regarding bypass caps. My e-mails tended to be in the form of statements about which I asked Todd to agree or disagree, and then to comment on. The exchange is reprinted below in an “interview” format. It has been edited for length, clarity and continuity, but not for content. Todd’s responses, in particular, have not been edited.